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Glucose in Serum (24-hour urine collection)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of glucose (sugar) excreted in your urine over a 24-hour period, helping assess how well your body handles blood sugar.

Quick summary

["A 24-hour urine glucose test helps detect hidden high blood sugar levels or kidney issues related to glucose spillage."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
33079-5
Short code
GA from BPD.ASUM89
Synonyms
GA from BPD.ASUM89
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-estimated-from-bpd-asum
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Matters

Your doctor may order this test if they suspect conditions like diabetes, kidney problems, or metabolic disorders where glucose might appear in urine despite normal blood sugar levels. It can also help monitor how well medications are working to control blood sugar.

What to Expect Before the Test

You’ll collect all your urine for a full 24-hour period (typically from one morning to the next morning). Drink plenty of water but avoid sugary drinks or foods that might affect results. Follow your doctor’s specific instructions for timing and storage.

During the Test

No special preparation is needed beyond collecting urine samples at consistent intervals. Lab technicians will analyze the urine for glucose content.

What the Results Mean

Results are usually reported as the total amount of glucose excreted in grams or milligrams over 24 hours. Abnormally high levels may indicate diabetes, kidney issues, or other metabolic conditions requiring further evaluation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

How often should I get this test?
This test is typically done once or occasionally, depending on your symptoms or medical condition. Your doctor will determine the frequency based on your needs, such as monitoring diabetes or kidney function.
What does a normal result mean?
A normal result means your body is processing glucose efficiently and likely not spilling excess sugar into urine. However, even normal results don’t rule out diabetes or other conditions—your doctor may still recommend further testing.
Can I eat or drink anything before the test?
Yes, you can eat and drink normally, but avoid sugary beverages or foods that might artificially raise urine glucose levels. Stick to your regular diet unless instructed otherwise.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy